NJW4140 Application Board

■Board Information Board Name: NJW4140 CG670 Function: MOSFET Drive Switching Regulator IC for Boost Converter

■Application Spec IC: NJW4140R Input voltage: 9V to 12V Output voltage: 20V Output current: 1.5A (@VIN=12V) Oscillator Frequency: 300kHz typ.

Standby Function: Operate: EN pin is high (connect REN=0 to VIN+)

Standby: remove REN and EN pin is low

■Board Image

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NJW4140 Application Board

■Application Circuit

CNF RNF 10,000pF 13k

EN

REN 0 VIN+=12V L 22mH/4.7A CIN1 CIN2 220mF/35V 0.1mF/50V COUT1 COUT2 SBD 100mF/35V, 0.1mF/50V VOUT+=20V x2pcs. 4 3 2 1 FB IN- EN V+ RG CFB 0 820pF VIN- R2 NJW4140 Q 82k RFB 20k CT GND SI OUT

5 6 7 8 R1 3.3k

CT 470pF RSENSE1 RSENSE2 C R 39m Open S1 S1 VOUT- 390pF 330

■PCB Layout

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NJW4140 Application Board

■BOM

Reference Qty. Part Number Description Manufacturer MOSFET Drive Switching Regulator IC for IC 1 NJW4140R New JRC Boost / Fly-back Converter Q 1 TPCA8052-H Nch MOSFET 40V, 20A Toshiba L 1 CDRH127LDNP-220 22mH, 4.7A Sumida SBD 1 DE5SC4M Schottky 40V, 5A Shindengen CIN1 1 EEEFP1V221AP Aluminum Electrolytic 220mF, 35V Panasonic CIN2 1 0.1mF Ceramic Capacitor 1608 0.1mF, 50V, B Std. COUT1 2 EEEFP1V101AP Aluminum Electrolytic Capacitor 100mF, 35V Panasonic COUT2 1 0.1mF Ceramic Capacitor 1608 0.1mF, 50V, B Std. CT 1 470pF Ceramic Capacitor 1608 470pF, 50V, CH Std. CNF 1 10,000pF Ceramic Capacitor 1608 10,000pF, 50V, B Std. CFB 1 820pF Ceramic Capacitor 1608 820pF, 50V, B Std. CS1 1 390pF Ceramic Capacitor 1608 390pF, 50V, CH Std. R1 1 3.3k 1608 3.3k, 1%, 0.1W Std. R2 1 82k Resistor 1608 82k, 1%, 0.1W Std. RNF 1 13k Resistor 1608 13k, 1%, 0.1W Std. RFB 1 20k Resistor 1608 20k, 1%, 0.1W Std. RSENSE1 1 UR73D3ATTE39L0F Resistor 2512 39m, ±1%, 1W KOA RSENSE2 0 Open   RG 1 0 (Short) Resistor 1608 0, 0.1W Std. RS1 1 330 Resistor 1608 330, 1%, 0.1W Std. REN 1 0 (Short) Resistor 1608 0, 0.1W Std.

The of the back side are 0 (Short).

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NJW4140 Application Board

■ Application Characteristics

Efficiency vs. Output Current (VOUT=20V, Ta=25ºC) 100 90 f=300kHz L=22mH 80 V+=9V, 12V, 15V

70

%) (

η 60 50 40

Efficiency 30 20 10 0 1 10 100 1000 10000 Output Current I (mA) OUT

Output Voltage vs Output Current (Ta=25ºC) 21.0 f=300kHz

20.9 L=22mH

) (V V+=9V, 12V, 15V

OUT 20.8 V

20.7

oltage V

20.6 Output 20.5

20.4 1 10 100 1000 10000 Output Current I (mA) OUT

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NJW4140 Application Board

Notes

1. The product specifications and descriptions listed in this document and/or related document are subject to change at any time, without notice.

2. New JRC strives to produce reliable and high quality products. New JRC's products are intended for specific applications and require proper maintenance and handling. To enhance the performance and service of New JRC's products, the devices, machinery or equipment into which they are integrated should undergo preventative maintenance and inspection at regularly scheduled intervals. Failure to properly maintain equipment and machinery incorporating these products can result in catastrophic system failures.

3. The specifications on this document and/or related document are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this document and/or related document are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. All other trademarks mentioned herein are property of their respective companies.

4. To ensure the highest levels of reliability, New JRC products must always be properly handled. The introduction of external contaminants (e.g. dust, oil or cosmetics) can result in failures of products.

5. New JRC offers a variety of products intended for particular applications. It is important that customer select the proper component for your intended application. You may contact New JRC's sale's office if you are uncertain about the products listed in this document and/or related document.

6. Special care is required in designing devices, machinery or equipment which demands high levels of reliability. This is particularly important when designing critical components or systems whose failure can foreseeably result in situations that could adversely affect health or safety. In designing such critical devices, equipment or machinery, careful consideration should be given to, amongst other things, their safety design, fail-safe design, back-up and redundancy systems, and diffusion design.

7. The products listed in the document and/or related document may not be appropriate for use in certain equipment where reliability is critical or where the products may be subjected to extreme conditions. You should consult our sales office before using the products in any of the following types of equipment. · Aerospace Equipment · Equipment Used in the Deep sea · Power Generator Control Equipment (Nuclear, Steam, Hydraulic) · Life Maintenance Medical Equipment · Fire Alarm/Intruder Detector · Vehicle Control Equipment (automobile, airplane, railroad, ship, etc.) · Various Safety Devices

8. New JRC’s products described in this document and/or related document are designed not to have radiation resistance.

9. New JRC's products have been designed and tested to function within controlled environmental conditions. Do not use products under conditions that deviate from methods or applications specified in this document and/or related document. Failure to employ New JRC products in the proper applications can lead to deterioration, destruction or failure of the products. New JRC shall not be responsible for any bodily injury, fires or accident, property damage or any consequential damages resulting from misuse or misapplication of its products. Products are sold without warranty of any kind, either express or implied, including but not limited to any implied warranty of merchantability or fitness for a particular purpose.

10. Warning for handling Gallium and Arsenic (GaAs) Products (Applying to GaAs MMIC, Photo Reflector). Those Products uses Gallium (Ga) and Arsenic (As) which are specified as poisonous chemicals by law. For the prevention of a hazard, does not burn, destroy, or process chemically to make them as gas or power. When the product is disposed, please follow the related regulation and do not mix this with general industrial waste or household waste.

11. Please use the product according to applicable environmental laws and regulations such as RoHS directive. For details including RoHS compatibility, please contact our sales office. We are not responsible for any damage or loss resulting from none compliance applicable laws or regulations.

12. In providing the products and technologies described in this document and/or related document to other countries, customer must comply with the procedures and provisions stipulated in all applicable export laws and regulations.

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